Sliding window.



H. NIKOLAUS.

SLIDING WINDOW.

APPLICATION IILBDMA1L28, 1911 1,078,369. Patented Nov. 11, 1913.

M Allorney WITNESSES UNITED STATES PATENT OFFICE;

HE MANN NIKOLAUS, or VIENNA, AUSTRIA-HUNGARY.

SLIDE? G \VINDOVV.

ing W indows of which the following is a specification.

This'inve ntion relates to a sliding window of which the sashes are all slidable, and also capable of tilting inwardly, and balanced by means of counter-weights hung on wirecords working behind the window frame.

In the tilting movement of the sashes the bearing of the pivot of the sash is completely locked so that the tilted sash can not shoot upward owing to the action of i, he counterweights.

The means for guiding the sashes consist of'a fixed lower guide pin and a retractile upper guid pin; these guide pins beingslidable in guide grooves as is well known in the art. The outer guide groove is vertical. The inner guide groove is van head in its upper part and inclines at ghelower end and joins the outer guide groove at an acute angle at the window sill.

An antifriction roller for the wire cord is located at the apex of the obtuse angle, and the apex of the acute angle is protected by an iron shoe. By this means the sliding of the sashes causes only very little friction because the wire cord comes in contact only with the antifriction roller which by its easy working practically annals th trio tion. This arrangement also enable es of very great width to be moved very easily.

My invention will be more clearly understood by reference to the accompanying drawing, in which Figure 1 is a vertical section of the window showing the sashes closed. Fig. 2 is a fragmentary sectional plan with the sashes closed. Fig. 3 is a detailed view of the locking means for the pivot bearings. Fig.

4 is a similar view taken at right angles to the Fig. 3. Fig. 5 is a view similar to Fig. showing in dotted lines the locking means in looking position.

The lower guide pins 8 to which the wire cords are attached, are secured in position to the sashes, and they serve also as pivots for the tilting movement of the sashes.

The top sashes O operate in exactly the same manner as the bottom sashes.

S ecificaticn of Letters Patent.

7 Patented Nov. 111. 1913.

Application filed March 28, 1911. Serial No. 617,438.

The acute angle formed by the junction ot the two guide rooves is protected on all sides by a metal slit-e 6 (Figs. 1 and 3).

in antifriction roller 4 with hearing" lope at the apex of the angle of the inner guide groove for the purpose of preventing all contact between the wire cord and the sides of the guide, groove, and consequent damage to the cord, so that there is only one place of friction in the rising movementof the sash, and therefore even very heavy sashes can: be raised with extreme case.

The two pairs of sashes U and O, O engage with each other by means of inter-fitting surfaces in such a manner as shown in Fig. l. as to form between the inner and outer sashes an air space which is entirely isolated from the outside, and the sashes lit quite tight to the wii'idow frame by means of a fourfold joint, so that the improved window sashes close tighter than ordinary existing window sashes.

The sashes are connected to the lower cross pieces by hinges and to the upper cross plates 5 (Fig. l) is provided for the wire pieces by a friction'fastening so that they can oe separated from each other for the purpose of cleaning the window glass on the inside. r

The pivot bearing 21 shown in Figs. and 5, has inserted in it a round disk 23 which is open at the top and has a slot. The pivot bearing plate has a circular recess which is smaller than the disk 23 said recess connecting with the groove 23 as shown in Fig. 3.

is a projection provided on the upper edge of the pivot bearing plate.

The lower guide pin 8 which serves as apivot is not round but polygonal and fits exactly in. the recess in the disk 23. In the tilting movement of the sash, the guide pin consequently takes the disk 23 along with it and thus completely closes the open-topped recess in the pivot bearing plate. The angle piece 25 is circular at the top and slides under the projection flat so long as the recess in the pivot bearing plate is left open.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. In a sliding window, the combination with a sliding counterweighted sash, of an inner grooved guide for the lower sash composed of two rectilinear portions forming an obtuse angle, an outer grooved guide joining said inner grooved guide, a lower guide pin on' the sash, an open topped pivot bearing for said guide pin located at the junction of the inner and outer guides, and a rotatable pivot bearing late having a recess in which the lower gui e pin enters when the sash is lowered, said bearing plate being adapted to lock the sash temporarily in position.

2. In a sliding window, a grooved guide, a window sash having a guide pin working in the grooved guide, means for permitting the sash to tilt, and rotatable means disposed at the bottom of the grooved guide to lock the sash against upward movement when the latter is tilted said rotatable means being concentric with the guide pin.

3. In a sliding window, a grooved guide, a sash having a guide pin working in the grooved guide, and a rotatable slotted disk disposed in the grooved guide for engagement with the guide pin to lock the sash against upward movement.

4. In a sliding window, a window casing provided with vertically grooved guides, a window sash in the casing having guide pins traversing the grooved guides, locking lates located adjacent to the bottom 0 the grooved guides and provided with slots extending inwardly from the periphery of said plates toward their centers, said slots being normally in communication with the grooved guides to receive the guide pins of the sash when the latter is lowered, and means for actuating the locking plates when the sash is tilted to move the slots in the plates out of communication with the grooved. guides for locking the sashes against upward movement.

5. In a sliding window, an outer grooved guide, an inner grooved guide parallel with the outer grooved guide for a portion of its length and connected to the outer guide at the bottom thereof by a branch guide, a lower sash having a guide pin working in the inner and branch grooved guides, means perinitting the sash to swing inwardly on the guide pin as a pivot, and a rotatable disk disposed at the bottom of the outer grooved guide and provided with a slot to receive the guide pin of the sash when the latter is in its lower posit-ion. P

6. In a sliding window, an outer grooved guide, an inner grooved guide parallel with the outer grooved guide for a portion of its length and connected to the outer guide at the bottom thereof by a branch guide, a lower sash having a guide pin working in the inner and branch grooved guides, means permitting the sash to swing inwardly on the guide pin as a pivot, a slotted disk disposed at the'bottom of the outer grooved guide with the slot in alinement with said outer grooved guide, and a square portion on the guide pin for rotating the disk when the sash is tilted.

, 7. In a sliding window, a grooved guide, a disk located at the'bottom of the rooved guide and provided with a slot in alinement therewith, a sash having a guide pin working in the grooved guide, means to permit the sash to tilt inwardly, and means on the guide pin to rotate the disk to lock the sash against upward movement when the latter is tilted.

In testimony whereof I aflix my signature in presence of two witnesses.

HERMANN NIKOLAUS. VVitnesses J osar FABRY, AUGUST FUGGER. 

